Sandpapering-machine



(No Model.) 5 Sheets-Sheet 1-.

V, BROTZ.

SANDPAPERING MACHINE.

No. 449,435. Patented Mar. 31, 1891.

Witnesses: Inventor:

(No Model.) 5 Sheets Sheet 12.

v. BROTZ. WSANDPAPERING MACHINE.

No. 449,485. Patented Mar. 31,1891.

Q2 5, N is s Witnesses: Inventor m: NORRIS PETERS c0. mum-who wAsHws 111111 c.

(No Model.) 5 Sheets-Sheet 3.

V. BROTZ. SANDPAPERING MACHINE.

No.449,435. PatentedMar.31,-189.-l.

mmmmlllm Inven r (No Model.) 5 SheetsSheet 4. V.. BROTZ. SANDPAPERING MACHINE.

No. 449,435 Patented Mar. 31,1891;

Witnesses:

' (No Model.) 5 Sheets-Sheet 5.

' V. BROTZ.

SANDPAPERING 44401111413.

Patented Mar. 31, 1891 Witnesses:

Inventor W (Z 44 Mia flzzorneys.

NITED STATES PATENT- SANDPAPERlNG-MACHINE.

SPECIFICATION forming part of Letters Patent No. 449,435, dated March 31, 1891.

Application filed September 24, 1890- Snrial No. 365,966. (No model.)

To all whom it may concern:

Be it known that I, VALENTINE BROTZ, of Buffalo, in the county of Erie and State of New York, have invented certain new and useful Improvements in Sandpapering-Machines; and I do hereby declare that the following description of my said invention,taken in connection with the accompanying sheets of drawings, forms a full, clear, and exact specification, which will enable others skilled in the art to which it appertains to make and use the same.

This invention has general reference to improvements in sandpapering-machines; and it consists, essentially, in the novel and peculiar combination of parts and details of construction, as hereinafter first fully set forth and described, and then pointed out in the claims.

In the drawings already referred to, Figure 1 is a side elevation of my improved sandpapering-machine. Fig. 2 is a plan of the same. Fig. 3 is an end view. Fig. 4 is a transverse sectional elevation in line 00 :r of Fig. 2. Fig.

5 is a plan of the sand-paper-roll-supporting carriage. Fig. 6 is a fragmental sectional elevation of the same in line y 'y of Fig. 5. Fig. 7 is a plan of the pressure plate and rolls. Fig. 8 is a side view of the same. Fig. 9 is a detail View of the yielding bearings employed in conjunction with the pressure-rolls.

Similar letters and numerals of reference are employed to designate corresponding parts in all the figures.

The object of this invention is the production of a sandpapering-machine the main characteristics of which are cheapness of construction, ease of operation, efficiency, and reliability from danger of derangement of parts through careless operation, the main object of the present construction being to provide a machine adapted for both light and heavy work, which will occupy but a small amount of space, so as to be especially desirable in small factories having but. 2. limited floor-space. To attain these results, I construct this sandpaperingmachine of a rectangular structure A, Figs. 1 and 2, which ispreferablycomposed of the upright columns or posts A, the horizontal cross-timbers A and the horizontal side beams A a a, as

illustrated in the drawings. The side beams A' are arranged to connect the corner-posts near the top and bottom thereof, while the beams a a are arranged at the center and bottom, respectively, as clearly illustrated in Fig. 4:, thereby leaving an open space, between the posts above said beams a a for the reception of an adjustable pressure-plate O, as hereinafter to be described.

In the center of the rectangular structure A and connecting the end, top, and center beams are horizontal beams a" cf, Fig. 4, which support the sand-paper-roll frame B. This frame is fully illustrated in Figs. 5 and 6, and consists of the side bars I) 19 and the top and bottom bars I) b, respectively, leaving an interior space within which the sand-paper rolls 0 revolve. The top and bottom bars 6 b' are provided with lateral ribs 6 6', Figs. 4 and 6, extending alongt-he entire length of the bars and on both edges thereof, the object of said ribs being to fit over the beams a a, as illustrated in the several figures, and thereby support said frame. Near the four corners of the frame, in the side bars thereof, are provided openings 0 c for the reception of apertured lugs (Z 61, projecting from the sides of the beams a a', as shown in Figs. 4:, 5, and 6.

At the corners of the frame B are located bosses B, having internal chambers E" B extending through the same, and within which operate eccentrics D D which are fastened to the ends of rods D D, which are passed through the apertured lugs d d on the r beams a Ct'. At the upper ends of these rods are fastened levers E, which are connected together by a rod E, so that a simultaneous movement may be imparted to the rods D D. eccentrics D D is to prevent the frameB from falling off the beams and to render the frame adjustable toward and from the beams to a', so that the depth of the cut of the rolls 0 may be regulated, the operation of these rods being as follows: The rods are journaled in the lugs (Z d, so that by revolving them they will, by the eccentrics operating Within the bosses B, force the said frame in either direction, as the case maybe. Within the said frame B are journaled a series of The object of the rods D D and I F, by means of which the sand-paper rolls may be revolved. One of these shafts O is longer than the other, so that belts may be led to both pulleys without interfering one with the other. The lower extremity of the shafts Oare connected to eccentrics G, fastened to a shaft G, which is journaled in a suitable bearing in the lower part of the machine, as shown in Fig. 1, by means of eccentric-straps G, which are provided at their upper extremities with yokes g, having bearings g, as shown in Fig. 1. In these bearings are journaled pivots g of sleeves H,

loosely fitting over the said shafts C, and upon which are fastened above and below said sleeves collars H H, respectively, wherebyv a reciprocating motion is imparted to said rolls by the eccentrics without interfering with the rotary motion imparted to them.

Motion is imparted to the horizontal shaft G by the vertical shaft I and a set of bevelgears I, Fig. 1. This shaft I is journaled in a suitable bearing 1, and is provided with a pulley j, over which leads a belt J, connecting with a pulley j, fastened to a vertical shaft K, journaled in suitable bearings K on the outside of the machine. At the upper end of this shaft K there are fastened pulleys 7s 7s, over which run belts Z Z, communicating with the pulleys F on the sand-paper-roll shafts O. The shaft K receives its motion through bevel-gears K from a horizontal shaft L, journaled in bearings L" ,Fig. 3, and

which is provided with tight and loose pul leys L to start and stop the machine.

At the upper end of the vertical shaft I is secured a pinion M, engaging a spur-wheel M, located above the center beam at. This spur-wheel is fastened to the end of one of a; series of feed-rolls N, which arejournaled in bearings on the sides of the center beams a a, Fig. 4:. This gear-wheel M imparts motion to the remainder of the feed-roll gears: M through the intermediate gears m,.Figs.1,

and 2.

Opposite the feed-rolls and in the opening: between the corner-posts and on top of the; side beam a, Fig. 4:, fits and rests the presstire-plate 0, fully illustrated in detail in Figs. 7, 8, and 9.

for different thicknesses of the articles to be sandpapered by means of a series of screwthreaded studs T passing through said plate and fastened therein so as to prevent end motion of the same, While not interfering with the revolution thereof. These studs are screwed into the beams a a', so thatby This plate is rendered adj ustable toward or from the feed-rolls to providewhereby a synchronous movement is im parted to all the studs.

sists, essentially, of top and bottom rails O O" and side rails o 0, respectively, and a back plate R. Pressure-rolls o are journaled in bearings 1?, Figs. 7, 8, and 9, which are fastened to iron or steel plates P. These plates are fastened at one end tothe rails O O of the pressure-plate, while the opposite ends are free, the said rails having recesses S, so that the bearings are free to vibrate, a rubber cushion B being interposed in a further recess in the rails O 0', so that should the bearings and rolls be pushed toward the rails O'O the rubber will be compressed, when upon the removal of pressure upon the rolls the same will return to their former position, assisted by the cushions H.

To enable me to remove the dust and gritty matter resulting from the sandpapering of the material from the interior of the machine, I locate a trough 1, Figs. 1, 2, and 4, underneath the sand-rolls O to catch all the sand and dust from the same. To this trough is connected-by a pipe 2 an exhaust-fan 3, having the outlet 7 and which fan draws the dust, &c., from the trough and discharges it through the outlet 7. This fan 3 has a pulley 6, by means of which and a belt 5, running over a pulley 4: on the shaft L, it is revolved. In practice I shall inclose the entire machine so as to incase all the working parts thereof, so that a draft will be created throughout the machine by the fan 3, and thereby the moving parts kept reasonably free from dust.

In operation the peripheries of the sandrolls 0 are covered by sheets of sand-paper, and to hold the same in position I form alateral groove in the periphery of each roll and fasten therein a metallic plate 11. To this plate I fasten by suitable screws 12 a similar plate 10. The groove before mentioned is of such a depth that both plates will be below the surface of the roll. Should it now be desired to use the machine, the steel plates 10, Fig. 5, are unscrewed from the rolls 0 and a sheet of sand-paper stretched around the periphery of each roll, the paper being so arranged that the ends thereof will be over the plate 11 of the roll. The plates 10 are now screwedinto their proper places and a belt from. a suitable source of supply of power is slipped over the pulleys L on the shaftLand the machine set in motion. It is evident from the foregoing that upon setting the shaftL in motion the sand-rolls C will be given a reciprocatory as well as a rotary motion, and the feed-rolls N will be revolved. The operator now takes the material to be sand papered and pushes it through the opening Z, Fig. 3, into the machine, the bracket 16 serving to support the end of the material before the rolls take hold of the same. The sand-roll-adjusting levers E, Figs. 1 to 5, are now manipulated until the rolls have advanced sufficiently so as to take a cut of the desired thickness from the material, after which the pressure-plate O is advanced by revolving the handle X, so as to apply a pressure to the material to generate sufficient friction between the feed-rolls N and the material to force the same through the machine and out at the opposite side. If desired, alighter out can now be taken from the material by slightly farther advancing the rolls 0 and again passing it through the machine.

This machine, While occupying a comparatively small floor-space, is applicable to a large variety of Work. It is admirably adapted for v leveling off and sandpapering the surfaces of door-frames, panel-frames, and the like. It is a well-known fact that in the manufacture of such frames the surfaces of the several portions thereof are not always plane with each other, thereby compelling the leveling off of the surfaces byplaning or othersimilar means. By using my machine this latter operation is unnecessary, it being simply necessary to take, say, two outs over the sur- -faces to attain the same result, one cut to level the surfaces and the other to smooth the same.

A great advantage of this machine lies in the fact that it can be cheaply gotten up, and, furthermore, that it is not liable to readily get out of order, thereby putting the possession of an efficient sandpapering machine within the reach of the smallest planing-mill.

It is evident that I may use but one sandpaper roll or a multiplicity thereof without departing from my invention.

Having thus fully described my invention, I claim as new and desire to secure by Letters Patent of the United'States- 1. In a sandpapering-machine, the combination, with the sandpapering-rolls and a series of feed-rolls located between the sandpapering-rolls and with their peripheryin the same vertical plane, of a series of pressurerolls journaled within yielding bearings atfixed to a plate 0, composed of the top and bottom rails O 0",side rails 0 0" and back plate R, said plate 0 being provided with screw-threaded studs in the top and bottom rails having sprocket-wheels U, connected by a chain V, and the yielding bearings consisting of the steel blades P, fastened with one end within recesses S in the rails O O and having the bearing for the shafts of the pressure-rolls and an elastic cushion R at the other end, as and for the object stated.

2. In a sandpapering-Inachine, an adjustable pressure-roll device con sisting of a frame composed of the rails O, O, o, and 0 and plate R, secured thereto, recesses S in. the rails O O yielding hearings in said recesses, composed of steel blades P, fastened with one end in said recesses and having on their other free end the bearings for the shafts of the pressure-rolls and elastic cushions R underneath the same, the pressure-rolls 0, revolving in said yielding bearings, and mechanism, substantially as described,for adgusting the pressure-plate, as and for the purpose set forth.

3. In a sandpapering-machine, the yielding bearings for the pressure-rolls, consistlng 1n the combination, with the top and bottom rails having the recesses S, of the steel blades P, secured within the recesses with one end, bearings for the shafts of the pressure-rolls on the other end, and elastic cushions R, located Within recesses in said rails and supporting the free end of said steel blades underneath said bearings, as set forth.

4. In a sandpaperingmachine, the combination, with the horizontal crosstimbers A, having the bearings for the horizontal shaft G, of the shaft G, the eccentrics G upon said shaft and having straps G surrounding the same, the upper half of said straps being provided with yokes 9, having the bearings g, the sand-paper rolls 0, the shaft 0 of said rolls, the sleeves II upon the lower ends of said shafts, provided with oppositely-located pivots g, engaging the bearings g, and the fixed collars H II upon said shafts above and below said sleeves, as and for the object stated.

5. In a sandpaperingqnachine, the combination, with the timbers a d, having the apertu red lugs 61 cl extending from the sides thereof, of a sandpaper-roll frame consisting of the top and bottom bars b I), having the lateral ribs 6 e, the side bars 7) b, the openings 0 in said bars for the reception of the lugs cl cl, the bosses B at the corners of said frame and having the internal chambers B B, the rods D D, passing through the lugs cl (1, the chambers 13 13', and the eccentrics D D, secured to said rods and operating in said chambers, as and for the object set forth.

6. The combination,with the frame A, having the longitudinal cross-timbers a d within the same, of the sand-paper-roll frame 13, having lateral horizontal ribs e e at the upper and lower ends thereof to support said sand-paper frame upon said beams, the bearings C on said frame, the shafts O, journaled therein, the sand-paper rolls 0 on said shafts, the pulleys F, and means, as described, for rendering the whole frame adjustable, as described.

7. The combination, with the frame having the beams extendinglongitudinally'across the interior thereof, a sand-paper-roll frame supported from said beams and having chambered bosses at its corners, apertured lugs extending from the side of said beams and engaging said frame, and rods passing through I my invention I have hereto set my hand in said chambered bosses on said roll-frame and the presence of two subscribingwitnesses. through said apertured lugs and having eccentrics engaging said chambers in said VALENTINE BROTZ. bosses, said rods having handles E, as set Attest: forth. MICHAEL J. STARK,

In testimony that I claim the foregoing as 7M. 0. STARK. 

